'''
ljust:返回原字符串左对齐

rjust：返回原字符串右对齐

center


语法：字符串序列.ljust(长度，填充字符)
'''

str1="通讯录管理系统V1.0"

#左对齐
print(str1.ljust(50,"."))
print(str1.rjust(50,"@"))
print(str1.center(50,"#"))

